References to A003947

G.f.: (1+x)/(1-4*x).
1, 5, 20, 80, 320, 1280, 5120, 20480, 81920, 327680, 1310720, 5242880, 20971520

1 seqfan posts

Thu Feb 5 17:23:06 CET 2009    [seqfan] More conjectures on sequence products
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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